How did mass culture signify a change in american life?

a. the new middle-class strove to create a completely independent identity.
b. americans became more alike in their purchasing.
c. a class of trendsetters emerged from the middle class.
d. rich and poor people used the exact same goods.

The person that said that the answer was d is wrong. The answer is not d.

Explanation:

d) a constitutional amendment

increases in demand are shown by a shift to the right in the demand curve. this could be caused by a number of factors, including a rise in income, a rise in the price of a substitute or a fall in the price of a complement.

which the answer is:

b